AP Season
Your teachers put the countdown on the board. Suddenly, you're bombarded with essays, FRQs, DBQs, and multiple choice questions. Drowning underneath practice tests and scoring guidelines, you search for the correct answers. It seems there will be no surviving.
Welcome to AP test season.
It sounds awful and is the dread of every student that participates. However, it's never too late to try to grasp that last minute concept or practice something your teacher hasn't clarified for you. In addition to giving out money for a review book (which you should consider), try these links and resources.
This website provides notes for some AP classes, including European History, US History, and Psychology.
This website isn't specifically designed for the AP tests, but it does provide note and examples for most subjects taught in school.
This website has downloads of practice tests for some of the AP subjects.
This app (for Apple devices) has flashcards for every AP subject. And not like one set -several sets for each subject. It also has the option to create your own card sets.
Search for AP review videos on YouTube -you should get several hits and one of them is bound to help.
Ask your teacher if they have study materials that could help you. More often than not, they already own review books and will share them with you or make copies of pages you need.
The CollegeBoard has several resources from old exams. Even just glancing at them can give you an idea of what may be on your test.
Perhaps most importantly, don't let the test-taking get you down. Focus on the material; the test will cover all of it and you can only strive to know as much as you can as thoroughly as you can.
Good luck.